[racket] extra exercises

From: Roelof Wobben (r.wobben at home.nl)
Date: Sat Apr 14 14:09:24 EDT 2012


Im following the book Desiging programms second edition.
I'm now at the end of chapter 2 and I get the idea I need some extra 
exercises so I can practice more to follow the desin recipe, difference 
between a global variable and a function parameter.
Are there somewhere some extra exercises I can do.


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